Heart Rhythm Disorders

• The First City Clinical Hospital. n.a. E. E. Volosevich — Arkhangelsk, Russia
• Astrakhan State Medical University — Astrakhan, Russia
• Chelyabinsk Regional Clinical Center of Oncology and Nuclear Medicine — Chelyabinsk, Russia
• South-Ural State Medical University — Chelyabinsk, Russia

• Nîmes University Hospital — Nîmes, Gard, France

Not specified

• The Heart Center, Rigshospitalet — Copenhagen, Dr., Denmark

• Cairo University Hospital — Cairo, Egypt

• Uhmontpellier — Montpellier, France